Exodus vs Jabber 2

It appears to me from some testing today that Exodus and Jabber 2 do not
agree on the case sensitivity of usernames.  I have a user, call him
John, who setup an account on my Jabber 2 server using Exodus.  He
registered as [email protected]  He registered successfully, and
participated in chats all day long.  The next day when he tried to
connect, he kept getting failures. He asked me to look into it.  It
happened to me too.  My ID was working fine, but his said the password
was bad or the id was already in use (or some such garbage...).  Finally
I deleted his account and re-created it.  Worked just great!  So I told
him to try it.  It doesn't work again.  So on a whim, i tried
[email protected] rather than [email protected], and it worked.

So, where does the fault lie?  I don't know.  Exodus and Jabber 2 were
both happy with the initial registration.  After disconnecting, it
appears that the account was created in lower-case, but Exodus attempts
to connect with an upper-case username.

For testing purposes I also tried PSI, another client.  I added
[email protected] and attempted a connection.  No problems.  It appears
the PSI send the username lowercase despite what I typed.

  Sean